c3-lang/c3

diff --git a/lib/c3/0.1/ratio.facts b/lib/c3/0.1/ratio.facts
index 60acc37..2fcee68 100644
--- a/lib/c3/0.1/ratio.facts
+++ b/lib/c3/0.1/ratio.facts
@@ -2,4 +2,4 @@
   version: 1}
 replace {Ratio, :is_a, :module}
 replace {Ratio, :symbol, Ratio.cast}
-replace {Ratio.cast, :symbol_value, cfn Ratio "ratio_init_cast" (Result, Tag)}
+replace {Ratio.cast, :symbol_value, cfn Ratio "ratio_init_cast" (Result, Sym, Tag)}